# Diffission

*Not Yet Rated*

- fractions
- grouping
- numbers
- patterns

- logic
- part-whole relationships

###### Pros

Intuitive gameplay and engaging challenges introduce core concepts visually.###### Cons

No way to monitor student progress, and may be hard for some teachers to implement in the classroom.###### Bottom Line

This fun visual game will help students practice with fractions.The simple game mechanics lead to a surprising level of complexity, although students may still lose interest after a while.

Diffission teaches fractions and teaches it well, covering a variety of concepts and integrating problem-solving into the mix.

There is not a lot of instruction, but the game is pretty straightforward -- you just have to think it through.

Diffission* *will work best if the teacher gets a few accounts and lets students experiment with the game in centers. As the game is $3 per account, teachers could be looking at $100 to have a whole class play a single game about fractions, so individual accounts are unlikely; unfortunately, the game is designed to work best for one user. Teachers could suggest Diffission to parents of students struggling with the concept of fractions or keep a couple accounts on hand for targeted practice.

Diffission is a fractions game that can be played online or downloaded as an iOS or Android app. The game mechanic itself is simple: Cut this shape into equal parts and highlight the fraction. As the user progresses, the game presents students with challenges of increasing complexity.

A surprising number of curveballs are thrown in at later levels, such as vanishing blocks that eliminate not only themselves but also any blocks touching them, or switch blocks, which jump from place to place when you make a cut. Critical thinking is embedded into these engaging puzzles, and students who initially call the game dull may find themselves engrossed in how to complete higher-level challenges.

Read more Read lessDiffission does a great job of letting students practice with fractions. It covers a variety of concepts, from equivalent fractions to the idea that not all pieces have to be the same shape (only the same size).

The game encourages mental math as students may have to add or subtract blocks using vanishing squares to get the right number of pieces. For example, a puzzle may say "highlight 2/9" but present you with 22 blocks, meaning you have to find a way to get rid of four. There is a great deal of logical and critical thinking involved, and the puzzles are well thought out and fun. In the end, Diffission presents a good model of fractions for visual learners.

Read more Read less## Key Standards Supported

## Number And Operations—Fractions | |

3.NF: Develop Understanding Of Fractions As Numbers. | |

3.NF.1 | Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b. |

3.NF.2 | Understand a fraction as a number on the number line; represent fractions on a number line diagram. |

3.NF.2.a | Represent a fraction 1/b on a number line diagram by defining the interval from 0 to 1 as the whole and partitioning it into b equal parts. Recognize that each part has size 1/b and that the endpoint of the part based at 0 locates the number 1/b on the number line. |

3.NF.2.b | Represent a fraction a/b on a number line diagram by marking off a lengths 1/b from 0. Recognize that the resulting interval has size a/b and that its endpoint locates the number a/b on the number line. |

3.NF.3 | Explain equivalence of fractions in special cases, and compare fractions by reasoning about their size. |

3.NF.3.a | Understand two fractions as equivalent (equal) if they are the same size, or the same point on a number line. |

3.NF.3.b | Recognize and generate simple equivalent fractions, e.g., 1/2 = 2/4, 4/6 = 2/3). Explain why the fractions are equivalent, e.g., by using a visual fraction model. |

4.NF: Extend Understanding Of Fraction Equivalence And Ordering. | |

4.NF.1 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b) by using visual fraction models, with attention to how the number and size of the parts differ even though the two fractions themselves are the same size. Use this principle to recognize and generate equivalent fractions. |

Build Fractions From Unit Fractions By Applying And Extending Previous Understandings Of Operations On Whole Numbers. | |

4.NF.3.b | Decompose a fraction into a sum of fractions with the same denominator in more than one way, recording each decomposition by an equation. Justify decompositions, e.g., by using a visual fraction model. Examples: 3/8 = 1/8 + 1/8 + 1/8 ; 3/8 = 1/8 + 2/8 ; 2 1/8 = 1 + 1 + 1/8 = 8/8 + 8/8 + 1/8. |

4.NF.3.c | Add and subtract mixed numbers with like denominators, e.g., by replacing each mixed number with an equivalent fraction, and/or by using properties of operations and the relationship between addition and subtraction. |

5.NF: Apply And Extend Previous Understandings Of Multiplication And Division To Multiply And Divide Fractions. | |

5.NF.3 | Interpret a fraction as division of the numerator by the denominator (a/b = a ÷ b). Solve word problems involving division of whole numbers leading to answers in the form of fractions or mixed numbers, e.g., by using visual fraction models or equations to represent the problem. For example, interpret 3/4 as the result of dividing 3 by 4, noting that 3/4 multiplied by 4 equals 3, and that when 3 wholes are shared equally among 4 people each person has a share of size 3/4. If 9 people want to share a 50-pound sack of rice equally by weight, how many pounds of rice should each person get? Between what two whole numbers does your answer lie? |

5.NF.6 | Solve real world problems involving multiplication of fractions and mixed numbers, e.g., by using visual fraction models or equations to represent the problem. |

5.NF.7.c | Solve real world problems involving division of unit fractions by non-zero whole numbers and division of whole numbers by unit fractions, e.g., by using visual fraction models and equations to represent the problem. For example, how much chocolate will each person get if 3 people share 1/2 lb of chocolate equally? How many 1/3-cup servings are in 2 cups of raisins? |